<template>
  <!--  template中书写组建的结构-->
  <el-menu default-active="1-4-1" background-color="#545C65" active-text-color="#FFCF49" text-color="#FFFFFF"
           class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
    <h3>{{ isCollapse ? '后台' : 'XX后台管理系统' }}</h3>
    <!--    无子页面-->
    <el-menu-item @click="clickMenu(item)" v-for="item in noChildren" :index="item.path" :key="item.path">
      <i :class="`el-icon-`+item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <!--    有子页面-->
    <el-submenu v-for="item in hasChildren" :index="item.path" :key="item.path">
      <template slot="title">
        <i :class="`el-icon-`+item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group v-for="(subItem,subIndex) in item.children" :key="subItem.path">
        <el-menu-item @click="clickMenu(subItem)" :index="subIndex">{{ subItem.label }}</el-menu-item>
      </el-menu-item-group>
      <!--      <el-button @click="jieshou">哈啊哈</el-button>-->
    </el-submenu>

  </el-menu>
</template>

<script>
// script中书写组件交互相关的代码(数据、方法等)

export default {
  name: "CommonAside",
  data() {
    return {
      isCollapse: false,
      menu: [
        {
          path: '/home',
          name: 'home',
          label: '首页',
          icon: 's-home',
          url: 'Home/Home'
        },
        {
          path: '/mall',
          name: 'mall',
          label: '商品管理',
          icon: 'video-play',
          url: 'MallManage/MallManage'
        },
        {
          path: '/user',
          name: 'user',
          label: '用户管理',
          icon: 'user',
          url: 'UserManage/UserManage'
        },
        {
          label: '其他',
          icon: 'location',
          children: [
            {
              path: '/page1',
              name: 'page1',
              label: '页面1',
              icon: 'setting',
              url: 'Other/PageOne'
            },
            {
              path: '/page2',
              name: 'page2',
              label: '页面2',
              icon: 'setting',
              url: 'Other/PageTwo'
            }
          ]
        }
      ]
    };
  },
  // 方法
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    clickMenu(item) {
      this.$router.push({
        name: item.name
      })
    },
  },
  // 计算属性
  computed: {
    noChildren() {
      return this.menu.filter(item => !item.children)
    },
    hasChildren() {
      return this.menu.filter(item => item.children)
    },
  },
  // 页面重新渲染
  mounted() {
    this.$bus.$on('hello', (data) => {
      this.isCollapse = data
    })
  }
}
</script>

<style lang="less" scoped>
/*style书写组建的样式*/
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}

.el-menu {
  height: 100%;
  border: none;

  h3 {
    color: #ffffff;
    text-align: center;
    line-height: 48px;
  }
}
</style>